Video: Koj txhais li cas thaum peb hais tias pseudorandom tooj generator yog cryptographically ruaj ntseg?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A cryptographically ruaj ntseg pseudo random tooj generator (CSPRNG), yog ib qhov twg tus lej uas yog generated yog ib qho nyuaj heev rau ib tug thib peb tog los twv seb dab tsi nws tej zaum yog. Kuj tseem muaj cov txheej txheem los rho tawm randomness los ntawm kev khiav haujlwm yog qeeb hauv kev xyaum. Hauv qhov xwm txheej zoo li no, CSPRNG ua tau qee zaum siv.
Ib yam li ntawd, tus lej random yog dab tsi hauv cryptography?
Random tus lej yuav tsum tau nyob rau hauv cryptoography rau tiam tseem ceeb, nonces (arbitrary single-siv tus lej feem ntau siv rau hauv kev lees paub thiab lub sijhawm stamping), ntsev ( random inputs siv nyob rau hauv hash functions) thiab ib zaug pads (ib zaug siv encryption mechanisms).
Tsis tas li ntawd, SecureRandom yog dab tsi? Constructor thiab Description. SecureRandom () Tsim ib ruaj ntseg random tus naj npawb generator (RNG) siv lub neej ntawd random tooj algorithm. SecureRandom (byte seed) Tsim a ruaj ntseg random tus naj npawb generator (RNG) siv lub neej ntawd random tooj algorithm.
Kuj Paub, vim li cas cryptographically ruaj ntseg pseudorandom naj npawb generators tseem ceeb heev rau cryptography?
Modular lej ua haujlwm uas ua ib txoj hauj lwm ntseeg tau. Lawv tsim cov txheej txheem hauv tsev ntawm niaj hnub cryptoography . Yog vim li cas cryptographically ruaj ntseg pseudorandom tooj generators thiaj li tseem ceeb rau cryptography ? Cryptographic primitives siv rau tsim ib ntus ntawm tus lej ntawd kwv yees random nqi.
Kev ruaj ntseg random ua haujlwm li cas?
Ib tug cryptographically ruaj ntseg tus lej random lub tshuab hluav taws xob, raws li koj tuaj yeem siv los tsim cov yuam sij encryption, ua haujlwm los ntawm kev sib sau entropy - uas yog, unpredictable tswv yim - los ntawm ib qhov chaw uas lwm tus neeg tsis tuaj yeem soj ntsuam. Txoj kev no yog ruaj ntseg muab hais tias lub kernel ua tsis overestimate ntau npaum li cas entropy nws tau sau.
Pom zoo:
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